2. Gravity Station

A gravity station, Figure E-1, is a physical location at which absolute gravity has been measured. Most surveyors will never use a gravity station directly but it is important for geoid modeling and controlling further gravity measurements.

Figure E-1 Standard Gravity Station Mark

The units of gravity are mgal. A gal (named in honor of Galileo) is one centimeter per second squared: 1 cm/sec². A mgal is a milligal, one thousandth of a gal